Chadwick was born in
Bromley,
Kent, in 1916, the third of six children of John Chadwick, a barrister, and his wife Edith (née Horrocks). His father died in 1925. He was an elder brother of the Very Reverend
Henry Chadwick, also a distinguished professor and historian of the early Church, and a younger brother of Sir John Chadwick
KCMG, a diplomat whose senior posting was as
British Ambassador to Romania. His eldest brother was sent to
Eton College, but Chadwick was educated at
Tonbridge School from 1929 to 1935. He was school captain and captain of the
rugby team. He then studied classics at
St John's College, Cambridge. He received three
Blues in rugby playing as
hooker for
Cambridge University R.U.F.C. in the annual
Varsity Match against
Oxford University in 1936, 1937 and 1938 (as captain). In 1936, during his first year at Cambridge, he was selected to tour with a
British Lions team in their
third trip to Argentina. The British team won all ten of its matches. During the 1937/38 season, Chadwick played for invitational touring side, the
Barbarians. Chadwick graduated with a
First in History in 1938. Having been influenced by
Martin Charlesworth and
Martin Niemöller in 1938, he took a First in theology at Cambridge in 1939. He then attended
Cuddesdon Theological College and was ordained to the diaconate and priesthood of the
Church of England in 1940 and 1941, respectively. He served as a
curate at St John's Church in
Huddersfield for two years and was then chaplain of
Wellington College in Berkshire until the end of the Second World War. He also played rugby during the war, for
Blackheath, and for an England team that played against New Zealand. ==Cambridge career==